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arm: imx8ulp: disable wdog3

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Disable wdog3 which is configured by ROM

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan
2021-08-07 16:00:49 +08:00
committed by Stefano Babic
parent 610083e547
commit 3a01f723ab
1 changed files with 35 additions and 1 deletions
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36
arch/arm/mach-imx/imx8ulp/soc.c
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@@ -144,9 +144,43 @@ int print_cpuinfo(void)
}
#endif
#define UNLOCK_WORD0 0xC520 /* 1st unlock word */
#define UNLOCK_WORD1 0xD928 /* 2nd unlock word */
#define REFRESH_WORD0 0xA602 /* 1st refresh word */
#define REFRESH_WORD1 0xB480 /* 2nd refresh word */
static void disable_wdog(void __iomem *wdog_base)
{
u32 val_cs = readl(wdog_base + 0x00);
if (!(val_cs & 0x80))
return;
dmb();
__raw_writel(REFRESH_WORD0, (wdog_base + 0x04)); /* Refresh the CNT */
__raw_writel(REFRESH_WORD1, (wdog_base + 0x04));
dmb();
if (!(val_cs & 800)) {
dmb();
__raw_writel(UNLOCK_WORD0, (wdog_base + 0x04));
__raw_writel(UNLOCK_WORD1, (wdog_base + 0x04));
dmb();
while (!(readl(wdog_base + 0x00) & 0x800))
;
}
writel(0x0, (wdog_base + 0x0C)); /* Set WIN to 0 */
writel(0x400, (wdog_base + 0x08)); /* Set timeout to default 0x400 */
writel(0x120, (wdog_base + 0x00)); /* Disable it and set update */
while (!(readl(wdog_base + 0x00) & 0x400))
;
}
void init_wdog(void)
{
/* TODO */
disable_wdog((void __iomem *)WDG3_RBASE);
}
static struct mm_region imx8ulp_arm64_mem_map[] = {